I just came across a great post from the Gaiam Life site about the question of being able to build muscle doing only yoga. Short answer – of course you can. Whether or not you should do it depends on the goals you have for your body. You have to understand that doing yoga allows you only to lift your body weight, so if you’re looking to build mass, you should instead be lifting weights.
Check out the article “Can Yoga Replace Strength Training?” for a more in-depth look at the pros and cons of choosing one training method over the other. Personally, I like to do both. I love doing yoga for strength, flexibility and relaxation. I lift weights because I want to build mass.
image courtesy of lululemon athletica